All three of the top-polling candidates in the Democratic primary faced key questions going into the fourth debate Tuesday night: How would Sen. Elizabeth Warren handle the pressure that comes with being a newly minted front-runner? How would former Vice President Joe Biden respond to President Trump’s attacks on his son’s work in Ukraine? And how would Sen. Bernie Sanders perform after having had a heart attack? In this installment of the FiveThirtyEight Politics podcast, the crew analyzes how the candidates addressed those questions.

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